You don't have to flash any modded BIOS in order to use XGA panel from Tablet, the modified BIOS is just for enabling the SXGA+ resolution.
If you want to use IPS panel (XGA or SXGA+) from Tablet, you have to modify the cable like that on the link above. For XGA, nothing more is needed, for SXGA+, use modded BIOS. You cannot use Wacom digitizer because the panel will not fit into non-Tablet lid with one attached, you have to remove it from the panel.
I assume you already noticed that you have to machine the tabs off from the Tablet LCD panel, right?
Just FYI, I have modified few X6x cables the way it is done in that topic linked above and it works like a charm. Quite easy too.
X60T:L7400,4GB,F3507g,64GB Crucial C300,6200N,SXGA+
X32s:PM 758 LV CPU mod,2GB,64GB microSATA SSD,COM mod,IPS