Issues installing & running Windows XP SP3 in Hyper V

I'm playing around with Windows XP as a VM in Hyper V for reasons I won't go into. I have a bootable Windows XP SP3 CD I created some time ago. I've hit the following issues.

1. I can install XP from the CD but Hyper V seems to want access to the bootable CD whenever the VM is restarted. It would be faster to use an ISO file stored on a SSD. I've tried various ways to create a bootable ISO file from my CD but failed. What's the best way of creating an ISO file which will install XP and run under Hyper V?
2. I installed a virtual switch using a legacy network adapter but cannot connect the VM to the internet. Has anyone done this and what are the key steps? Is it safe to use XP to connect to internet from Hyper V?
3. I mounted the VM's .vhdx file to copy over some programs to test but this broke the VM's virtual drive configuration on restarting the VM. What's the best way to transfer files to the VM from elsewhere on my PC?