Last week Microsoft released RSAT (previously called admin pack) for Vista.  Service pack 1 is a requirement, and the install is a pain because you have to add the feature afterwards.

Download the Microsoft Remote Server Administration Tools for Windows Vista Service Pack 1 32-bit Edition (KB941314) package now.
Download the Microsoft Remote Server Administration Tools for Windows Vista Service Pack 1 64-bit Edition (KB941314) package now.

To install RSAT, follow these steps on a computer running the final release of Windows Vista with SP1:

1.Download the RSAT package from Microsoft Web site.

2.Double-click the downloaded package to start the Setup wizard. Follow the instructions in the wizard to complete the installation.

3.Open Control Panel, click Programs, and then click Turn Windows features on or off under Programs and Features.
If you are prompted to provide permission by User Account Control, click Continue.

4.In the Windows Features dialog box, select the remote administration snap-ins and tools that you want to install, and then click OK.

5.Configure the Start menu to display the Administration Tools shortcut. To do this, follow these steps:

a.Right-click Start, and then click Properties.

b. On the Start Menu tab, click Customize.

c. In the Customize Start Menu dialog box, scroll down to System administrative tools, and then select Display on the All Programs menu and the Start menu.

d. Click OK.

6.For a complete list of tools included in the RSAT final package, installation instructions, and other help topics, see Remote Server Administration Tools Help in the Administrative Tools list on the Start menu.