[HeArTBeaT]

I seen a old tutorial once in wich someone explained how to play 0.3d and 0.3e servers at once by having the 2 clients at the same time in only 1 gta folder (didnt make 2 gta folders , one for each version , just so no confusions are made).
I ******d for that video but it dissapeared.
Can someone tell me how to do this?
Because I dont wanna switch from version to version everytime I want to play different servers.