grooming?? but seriusly.. do it your self la.. practice make prefect

try to do it yourself
here is the link. Try using the special nail cutter for cat/small dog
warning : If you afraid they will know
http://www.guinealynx.info/nails.html
http://www.youtube.com/watch?feature=playe...d&v=UNAX_k2EGw4
you can get a younger male - a baby is easier
Try to put them together, not in a cage, in a neutral environment where there is no smell of others. Have to leave them and monitor - afraid of fighting. But normally a younger guinea pig will respect the older and let the older be a dominant one. here the link for introductions under the Adding a 2nd Cavy

http://www.cavyspirit.com/sociallife.htm