rebel_son,
Yes, you could probably find an RJ45 coupler or wire the blank end to an RJ45 jack and plug another CAT5 cable into that jack - but again - not a recommended configuration. The BEST solution is a single, uninterrupted CAT5 or preferrably a CAT6 cable with RJ45 jacks on each end wired for as a standard Ethernet patch cord:
Needs to be wired as such:
http://www.ertyu.org/steven_nikkel/ethernetcables.html
- John