How to copy paste content between Linux guests running on Vmware and Citrix XenDesktop ?

Issue

• We were using VMware with Windows 7 but now we want to migrate to XenDesktop.
• I have installed ICA client 12.1.0 and I connect to the Citrix server from Firefox 17 (login with login/pass).
• I want to know what it sould be possible to do between the 2 desktops ? Examples:

drag & drop files ?
drag & drop images ?
copy/paste text ?
copy/paste files ?
copy/paste images ?

• At the moment only the copy/paste of text is working.
• How to capture Screenshots of Linux guest and paste it on a powerpoint on the Citrix session. Do you have an idea ?