HTC G1 "glass broke drop" Questions

glass broke,phone still works fine,but i'll like to replace the glass screen,anywhere i can have this done w/o sending it to t-mobile?and also,,is there a better battery for this phones,dont last that

...glass screen broke off. i went on ebay and the sale the parts and tools there but need to know what exactly to do! unscrew the screws on the chrome thing to the phona and disconnect/ cut the existing ...