I'll assume you're just using JMeter as a type of Web Crawler with a fixed set of pages to consume, and you're only measuring response times and http status.
- Create a thread group of 100 users
- Place a CSV Data Set Config under the thread group
- The CSV contains one URL per line
- The CSV loads into a parameter named "URL"
- A HTTP Sampler is used where the hostname is set to ${URL}
- Specify any assertions you need, eg "200" http response
- Run it and see how it goes
Heres some pictures of the setup in JMeter using the default samplers and config elements;
Create the threadgroup:
Create the CSV Reader

Create the HTTP Sampler

Have an assertion checking you get a decent response

Optionally record the responses for review
The CSV File i'm using looks like:
/
/
/robots.txt
/imghp?hl=en&tab=wi
/imghp?hl=en&tab=wi
/intl/en/options/
/intl/en/about/products/
/intl/en/about/products/
/history/optout?hl=en
com/history/optout?hl=en