harlzter:
Now that I dont know

ahh tiz ok m8, thanks for pointing out the rather obvious 2 that i missed.. I'm sure i heard someone on here say that all play cards are class 4, but they were obviously wrong..
I suppose it would only depend on the read speed of the card, the write being super slow just means it will take a few days to put 4gb of "my backed up games" on, but as for the games playing, they go as fast as the read speed is which should be good enough,,
If anyone has tried a class 2 sdhc on a DS lite rom card (any version) please let me know your results..
Ta..