PRS-500 Upgrade firmware

[ambertape]

is the specs for the original PRS-500 the same for the new upgrade like using a 2gb sd card or could I use 4 or 8 gb cards since they are cheaper.

Can one increase the internal memory of the PRS-500 higher than 90 mb ?

If I download from MaximumPC their pdf versions of their magazines, will this upgrade work better than previous versions. I believe my basic problem was that MaximumPC scans their articles and save them as a pdf file. This isn't a real created pdf file. I also save web pages of interest as a pdf file. Will the support of Adobe for pdf files give me the ability to read these files in the new reader ?

Please explain to me reflow and how it might help me with the above pdf files.

Would using Adobe Acrobat with above pdf scans and then saving them in Adobe pdf format work ?

Thanks