Ok, as per some stuff I've seen, I downgraded to 2.4.0 and tried. Now, when insmodding tulip.o, I only get:
init_module: Device or resource is busy.

Ideas/where to go from here/

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EPoX 8KHA+
Athlon XP 1900+
512 MB DDR-SDRAM
PNY GeForce3 TI 200