dynamics crm - CRM 2011 Reference ClientGlobalContext.js.aspx in custom aspx -

i have custom aspx page needs iframed in crm. i'm in need use xrm.utility.openentityform in custom aspx because wanted open entity record in crm web client/outlook custom page. possible reference clientglobalcontext.js.aspx in custom aspx page? what's best approach kind of scenario?

from microsoft : "you can use them in form scripts or in ribbon commands. html web resources, available when include clientglobalcontext.js.aspx page." have 2 options:

• use webresources (silverlight or html)
• use window.open