A Prussian Conundrum.

lately I've not been painting much, but what i have been painting has been mostly sci fi. But last night's Lasalle game( battle report is in the works), got my Napoleonic juices flowing again.

I was hit by another bout of insomnia last night, so i decided to pull out some Perry Prussians to paint.  I completed half a battalion(including the command) and realized I had no flags to use for them. so I set about looking for suitable bits to make my flags.

the research is a little sketchy. i was mostly relying on pictures on warflag with a few places cross referenced.

1st east Prussian infantry, 2nd battalion?

The first 2 flags I've done are teh 2nd battalion of the 1st  and 2nd East Prussian Regiments( 1st and 3rd infantry regiments, respectively), i think. The 1st battalion flags(Avancier fahne?) seem to be essentially inverted colours. so the 1st east Prussian 1st battalion flag would be white field instead of black,  teh eagle would be gold, with the white around it black.

2nd East Prussian Regiment, 2nd battalion?

the order of battle I'm using for the force i chose is the from the Battle of Leipzig.  Army of Silesia, Prussian I corps, 2nd Brigade. under the command of General-Major Prinz Karl Von Mechlembourg-Strelitz.  depending on the source there are 2 or 3 battalions each of the 1st and 2nd East Prussian regiments.  but in my research on flags I've only seen mention of the 1st and 2nd battalion. so which flags would the 3rd battalion use?

Unfortunately I'm currently unemployed so my sources are a little lacking at the moment. any help anyone can give would be greatly appreciated.