Mousepad is part of Xfce which is in the repository. If you want this editor stand-alone (without Xfce) what you are really looking for is leafpad. There is a leafpad package in the VL 6.0 repository that wll probably work fine with 5.9 as well. I did plan on building a leafpad package for 5.9 and I will get to it as soon as I can.
eMachines EL-1300G desktop, 1.6GHz AMD Athlon 2650e CPU, 4GB RAM, nVidia GeForce 6150 SE video
CentOS 6.5 (will try VL64-7.1 soon)
Toshiba Satellite A135-S4727, Intel Pentium T2080 / 1.73 GHz, 2GB RAM, Intel GMA 950
HP Mini 110 netbook, 1.6GHz Intel Atom CPU, 2GB RAM, Intel 950 video, VL 7.1