SAP, FI-AA, asset values transfer t-code

Since release 4.6C, most of the transactions in FI-AA were replaced with Enjoy transactions, such as ABUMN, ABT1N, ABZON, AFABN and etc. and etc.
There's one small thing about Asset transfer t-code ABUMN. This Enjoy transaction doesn't allow to edit asset values on depreciation areas level.

Suppose you need to do following asset transfer transaction:

Asset A:
      Net Book Value   Cumulative depreciation  
01          100                          75
10           95                           70

You need to do partial transfer of asset value on another, newly created asset B.

What you want to do is:

Depreciation area 01:

Posting key                   Amount
      75           Asset A       60
      40           G/L             60
      70           Asset B       60
      50           G/L             60

Depreciation area 10:

Posting key                   Amount
      75           Asset A       55
      40           G/L             55
      70           Asset B       55
      50           G/L             55

This kind of operation is not possible with ABUMN.

This is due to design of Enjoy transactions, which is explained in OSS note 370530 - Functions in new Enjoy transactions.

Extract from the OSS 370530 on reasons:

Reason and Prerequisites:
1. This problem is caused by the program design: The Enjoy transactions are designed to cover the features required by a majority of users every day. Therefore, other functions are provided by the previous transactions to keep the Enjoy transactions as simple as possible in the application.
2. Release planning: We plan to enhance the Enjoy transactions step by step and add some of the previous functions. However, we do not yet know which functions will be available in the Enjoy transactions in which release.

So basically if your roles contain only access to Enjoy t-codes, you might need to add ABUM t-code in FI-AA roles, and proceed with executing transaction described above, separately for each depreciation area.