German XDA II XDA2 first config question

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Hi,

the questions might sound silly to you folks:
Got my XDA2 in Germany (with O2 and WAP Flatrate).
When "booting" initially it asks you if you are a "Privatkunde" (private customer / end user) or "Firmenkunde" (business client). Does anybody know what is the difference/consequence in the setup according to this choice? Can you alter it afterwards? The instructions don't mention anything.

I do not "trust" the preconfigured GPRS and GPRS WAP settings for O2. I have the WAP-Flatrate, however, it only configures a WAP-proxy and none for HTTP (not even the WAP proxy also for HTTP)... so I have my worries that due to this configuration opening the Interent Explorer will use a regular GPRS connection instead and be costly.
Does anybody know more about this?

Head compression is "off" (why don't networks support this?), the preselected GPRS Mode does not seem to be optimal...

Are there any "tuning" tips already for the new XDA2?
Any flash software/ROM for the XDA2?

Regards,

Andreas Erben