Esshup you mentioned a rope for pulling wire, trick to getting a snake line thru existing conduit, if you have never seen it done is as follows. You need a plastic shopping bag, commonly dispensed at Walmart and the like, a length of heavy twine longer than your conduit, I have used the nylon stuff that looks like them 49 cent stringers with a loop and metal probe on each end, that style of twine, and a shop vac. Tie the twine to the handles of the shopping bag, stuff the bag in the conduit, suck it thru with the shop vac, the twine follows and presto, you have a snake line in your conduit.

Thats all I got.