If you're renting gpu solely for mining, you're probably going to lose money. Anyway, this thread may help (see OP)
http://bitcointalk.org/?topic=7403.0Not exactly your config but the Op does have 2 x NVIDIA Tesla “Fermi” M2050 GPUs. As for miner, you want a miner that uses CUDA.
I'm not renting GPU - it's free usage 24/7 for 6 months.
Any other suggestions ? :s