Firstly, does your PC have a writable disc drive. Later ones are DVD which can also do CD, earlier ones are generally CD only. Again, later models are usually both plus and minus DVD/R (The plus etc are the two types) and the earlier are generally one or the other, and not compatible.
For pictures, they take little space and can you can generally get loads on a CD. Blank CD's are very cheap. The easiest way is to create a new folder, copy the pics you want into it, and then use whatever software you have to create a CD