[TYPO3] customizing sr_feuser_registration templates

[Nagita Karunaratne]

I am trying to customize the templates of the sr_feuser_registration 
extension.

What is the usual way to customize?

1) Edit the template file and add your own classes and use a custom css 
file. Some styles are built into the template file (eg. the size of the 
input field for the last name is '40')

2) Just use a css file and use the'id' parameter to adjust the styles of 
individual elements

I see some T3 sites seem to have modified the template file itself. Is 
this recommeded?

Thanks,
Nagita