Chameleon Social Script update and modifications

Hello We have a website build on chameleon social script version 4.4.23927. The site was modified, custom mods was added to it and we tried to update it to the last version 4.5 but some functions was broken. We need to update it to the last version and keep the modifications and eventualy fix them. Also we want to fix some bugs that come with the software by default. We want to hire someone who worked with chameleon social script in the past or a very good programmer