Here is a no doubt touchy subject. If the Poles did get a sattelite status like some of the Balkan states, what might their position on deporting Jews be? Or might the Germans decide since Poland had half of Europe's Jewish people that they would just dump them in there?
That's a complicated issue, because Hitler did approach the Poles about the 'Jewish Question' pre-war and assumed because Poland was actually more anti-semitic that they would be up for killing the Jews along with him; of course they were horrified and rebuffed him when he alluded to it. Now, they had their own pogroms in the late 1930s and were actively training extremist zionists to fight the British in Palestine to drive them out and then allow for unlimited immigration of Jews from Europe:
http://en.wikipedia.org/wiki/Lehi_(group)#Evolution_and_tactics_of_the_organization
Many Lehi combatants received professional training. Some attended the state military academy in Civitavecchia, in Fascist Italy.[37] Others received military training from instructors of the Polish Armed Forces in 1938–1939. This training was conducted in Trochenbrod (Zofiówka) in Wołyń Voivodeship, Podębin near Łódź, and the forests around Andrychów. They were taught how to use explosives. One of them reported later:
Poles treated terrorism as a science. We have mastered mathematical principles of demolishing constructions made of concrete, iron, wood, bricks and dirt.[37]
http://en.wikipedia.org/wiki/Avraham_Stern
Stern developed a plan to train 40,000 young Jews to sail for Palestine and take over the country from the British colonial authorities. He succeeded in enlisting the Polish government in this effort. The Poles began training Irgun members and arms were set aside, but then Germany invaded Poland and began the Second World War. This ended the training, and immigration routes were cut off.[8] Stern was in Palestine at the time and was arrested the same night the war began. He was incarcerated together with the entire High Command of the Irgun in the Jerusalem Central Prison and Sarafand Detention Camp.
Basically the Polish policy seems to have been to export their Jewish population was feasible and were promoting groups that would enable that. The Nazis were working along similar lines in the 1930s:
http://en.wikipedia.org/wiki/Haavara_Agreement
http://en.wikipedia.org/wiki/Madagascar_Plan
Probably the Poles as German clients would be able to continue that policy, potentially with German help, but so long as Germany didn't annex Poland like IOTL they probably would avoid anything to do with the Polish Jews other than to keep them away from Germany; remember in 1939 the Jewish population in the Reich had mostly emigrated, so they weren't exactly keen on taking on more Jews.
http://en.wikipedia.org/wiki/History_of_the_Jews_in_Poland#Growing_antisemitism
Depending on what happens during the Polish-Soviet war Hitler might well then be able to convince Poland that the Jews were collaborating with the Soviets, as the Judeo-Bolshevik conspiracy propaganda was the most effective Nazi propaganda in Eastern Europe, which they used to get the locals to help murder their local Jewish populations (also check out "Bloodlands" for more on this):
http://en.wikipedia.org/wiki/Jewish_Bolshevism
The label "Judeo-Bolshevism" was used in Nazi Germany to equate Jews with communists, implying that the communist movement served Jewish interests and/or that all Jews were communists.[5][page needed] According to Hannah Arendt it was "the most efficient fiction of Nazi Propaganda".[6] In Poland before World War II, the label Żydokomuna was used in the same way to allege that the Jews were conspiring with the USSR to capture Poland.
The Poles if they were angry enough might well take out a lot of hatred on their Jewish population with Nazi backing, but also their Ukrainians and any other collaborators. It would not be a good situation and a lot might happen under the context of the cover of the fighting when no media was looking and later claim they died in the course of the fighting or by Soviet hands.
Potentially they could then force out the Jewish Poles into the USSR during/after the war.
A lot depends on the context of the German-Polish relationship and what aid is provided; I highly doubt Stalin would invade without Germany doing it first precisely because Stalin was afraid of a united Europe against him, which this would definitely trigger, plus it would give Hitler all the cover he needed for his war on the USSR. The only way I could see this happening is perhaps if Trotsky ended up replacing Lenin in the 1920s and launched and new invasion of Poland out of fear of Fascist Europe uniting against him, but that would be before 1939 for sure, potentially in the early/mid 1930s as the Nazis were rearming, but before they got too powerful.