will the 350 be used for all decoding?

[sub]

and with the hauppauge remote with the pvr 150 - does it use the irc blaster for the reciever or do i need an external reciever?

There is a single combined receiver/blaster that pokes out the back of a PVR150.

i am just looking for full funtionality of the remote. i guess i could still use my usb uirt and just have it learn all the buttons from the hauppauge remote and im assuming it uses the same buttons from the hauppauge remote? i dont know if you will understand wat i mean..

Yes, you should be able to do that.