Endpoint Protection

I'm new to this product. I was trying to simply create two packages for x86 and x64 platforms. I created two client installation packages. When trying to delete a package I get a can't delete this is the latest package message for both packages. How do I delete these packages?

 But why are you trying to delete it ..you cannot delete the Packages listed in SEPM -Admin-Install Packages --the Latest Ones.

Where are you trying to delete/create them from?
is it in the clients (on left) then Install Packages (on right)?
Or through the Wizard etc...???

I think you got confused 
The client installation packages which is exported from the SEPM will not appear on the SEPM console. The latest package which is appearing in the SEPM console cannot be deleted. The packages will came to console in following ways
While installing an SEPM 
While upgrading an SEPM (The package used for up gradation will add the same version package automatically during up gradation)
Adding a package manually to the console
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If you want to add a latest package in the console do as follows

Open Symantec Endpoint Protection Manager Console
Click the Admin Tab on the left
Select the Install Packages button in the lower center section.
Click Add a Client Install Package under Tasks
Specify the name you would like the package to have
Click Browse
Browse the original installation media to \SEPM\PACKAGES
Choose SAV32.info or SAV64.info
Click Open
Click OK on the "Add New Software Package" screen
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For exporting a package for installing in clients from SEPM do as follows

Open SEPM
Click the Admin Tab on the left
Under "Client Install Package" right click the package of your choice
Click Export
Click Browse and choose the folder where the EXE file should be placed
Click OK
Note: You can leave all items as the default or choose the options you would like.
Click OK
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Or if you want to create a custom installation package refer the below doc
Creating custom Client Installation packages in the Symantec Endpoint Protection Manager Console