Jim
>> How do I remove my named instance,
go to Control panel >> add/remove programs and click Microsoft sql server 2005 and finally remove. it should give you all instances and their components. select the ones you want uninstall and proceed.
>>how to I get SRS to work ?
since you already have green ticks ,make sure that report services is running(see sql configuraion manager).once up just try following in IE
if everything setup correctly you should see default page(i.e. report manager page)