Based on past experience I find it best to claim no knowledge as to the content of these links. Nor do I admit to having used them. These are just links found in other forums and around the internet. Use them as you will. I did my best to label them to help with what you might be looking for. I'll add more links in the future.
Adding Text to Speech:
You can start at step 7 on the site and manually create the folders mentioned in the instructions on your device. Also make sure to copy the , COMBRK.DLL, and COMRSRC.DLL in the same location as your miomap.exe on your flash disk. I also provide step by step instructions on the Tutorials Forum page above. So I would download the files from the link below then come back and look at my step by step instructions on what to do with the files.
http://www.sireathome.com/mio/TTS.html
Cracked MioMap Files (needed for adding new maps to MioMap):
You only need the 3 files not the data.zip from the download at the site below
http://mioheaven.mywebcommunity.org/
Skinning your MioMap Software:
http://www.simplyphoto.com/MIO/
http://gpstrooper.googlepages.com/igoskins
Skinning your Igo8 Software:
http://artwork-igo8.blogspot.com/
http://www.riks.iamze.info/english.htm
Creating your own color profiles for Maps and other info:
http://mio.digiwalker.googlepages.com/pna_schemes-voices-languages
http://artwork-igo8.blogspot.com/search/label/colormap
Other Useful Sites and Forums:
http://www.hugginsnet.com/ilovemymio/
http://c230.wordpress.com/adding-canada-maps-to-mio-c230/
http://www.kombitz.com/2008/01/09/miomap-33-datazip-tweaks/
http://www.volny.cz/sstopar/mio.html
http://www.navguide.net/igomiofan/home/p_2/
http://www.gpsunderground.com/forums/forumdisplay.php?f=4
http://www.gpsforum.biz/index.php?act=idx
Awesome site of a talented person that has made all kinds of stuff for your Mio, even an awesome looking version of an unlock that is built upon the Simple Unlock... definitely worth taking a look and try!!