If you're looking to make the club with the '5' on the bottom go farther, there are two options:

1) bend your current clubs stronger
2) buy a new set of clubs with stronger lofts

It could be time for a real fitting. Head to www.pcsgep.com and use the locator, or head to www.danscustomgolfshop.com/registry.html and contact someone close to you.

At 5'5" and 187, I'm thinking that perhaps there's a swing issue/strength issue that's robbing you of distance (although proper shafts could help, too).