Thanks to the suggestion of the friendly folks here, i bought Paint Shop Pro, which I found was really helpful with coloring (more so than by hand). So, if you have software like that, it definately helps. If you already have software like that but don't know how to use it for coloring I've found a site that really helps:

for paintshop coloring:
http://www.polykarbon.com/tutorials/pspchannel/pspch1.htm

for photoshop coloring:
http://www.polykarbon.com/tutorials/html/channels2.html

"Amor, amor, nada hay peor ni mejor" -proverbio