Newbie questions... re 100Webspace, GoDaddy, masking and similar hosts

[DestinyRules]

Hey,

Decided to probably use 100Webspace and GoDaddy to make my site.

Just wondering - how do I make sure the GoDaddy free masking covers all layers and pages within my site?

Also is anyone familiar with 100Webspace or similar? I can't seem to get ride of the 'Index' on my domain, do I just have to start with a subfile?

Many thanks!

Natalie