for cpuminer you don't need to install software.
just copy the zip, decompress and run a .bat like:
Still to minimize network usage, you'd need to run the stratum proxy pointing properly to where are you mining

C:\guiminer\cpuminer\minerd -a sha256d -o http://server:port -u user -p password -t number_of_threads

I foung something interesting:  "Mining Javascript with WebGL",  maybe it would help?