A couple of things after playing around for a bit.
The giveall command adds about 400 items to your inventory, but the inventory limit is 150 items (as it was in the Xbox 360 version). That means you can't buy or pick up any new items until you get rid of at least 250 items - either by selling them or by turning them into omnigel. Note that having that many items severely impacts the framerate in the shop buy/sell interface.
The min-max paragon and renegade values are about 1 to 300.
From the same Bioware forum thread I assume Gsccc got the codes he listed from -
givetalentpoints #
However it only gives talent points to Shepard, not the rest of the party.
[Edited by DarthParametric, 5/31/2008 4:31:24 AM]
this can be changed by going to C:\Documents and Settings\Glyth\My Documents\BioWare\Mass Effect\Config
and opening bioparty.ini
and changeing wats there to any number you wana carry
m_nMaxInventoryItems=9999